Power cylinder and piston



Feb; 23, 1932. w c. HAG-AN 1,846,104

POWER CYLINDER AND PISTON Filed July 15, 1931 3 Sheets-Sheet l Inventor illizzm C. Haydn flzmaarih flllorney 5 sheets-sheet 2 Inventor w. c. HAGAN POWER CYLINDER AND PISTON Filed July 15, 1931 William Haydn Byfig Feb. 23, 1932.

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POWER CYLINDER AND PIST'ON Filed July 15, 1931 3 Sheets-Sheet 5 William GQ Hagan Patented Feb. 23, 1932 WILLIAM C. HAGAN, F KINGSTON, PENNSYLVANIA rowan. CYLINDER AND rrsmoiv Application filed July 15, 1981.

This invention relates to a power cylinder and piston for use with any suitable fuel or actuating fluid and has for its primary object to provide, in a manner as hereinafter set forth, a power cylinder and piston embodying a novel construction, combination and arrangement of parts, whereby a materially greater degree of efliciency is had.

Other objects of the invention are to pro- VltlB a power cylinder and piston of the character described which will be simple in construction, strong, durable, reliable in operation and which may be manufactured at low cost. a

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like charactors of reference designate corresponding parts throughout the several views, and wherein Figure 1 is a View in top plan of a power cylinder and piston in accordance with this invention.

Figure 2 is a view in vertical section there through.

Figure 8 is a view in horizontal section taken substantially on the line 3-3 of F igure 2, looking downwardly, as indicated by the arrows.

Figure 4 is a View in side elevation of the piston and the lower portion of the trailer.

Figure 5 is a detail view in vertical section through the piston without the stepped depression.

Figure 6 is a detail view in bottom plan of the piston.

Figure 7 is a detail view in vertical section through a solid form of trailer.

Referring now to the drawings in detail it will be seen that the reference numeral 1 designates a cylinder of uniform diameter throughout having formed integrally on its upper and lower ends the apertured, external flanges 2 and 3, respectively. The flange 3 is for connection with a suitable crank case, a portion of which is designated by the reference numeral 4. The cylinder 1 is open at its ends,

Serial No. 551,064.

The reference numeral 5 designates a head which is also open at its ends, said head being of less diameter than the cylinder 1 and having an outwardly and then downwardly directed flange 6 on its lower end engaged on the flange 2 of the cylinder. The head 5 has a bore of smaller diameter than the bore of the cylinder 1. Bolts 7 extend through openings provided therefor in the flange 6 and are threaded into the flange 2 for re movably securing the head 5 in position. The lower portion of the head 5 is internally grooved for receiving the packing rings 8. The upper portion of the head 5 is enlarged and is provided with an internal, annular reservoir 9 for the reception of lubricating oil which is deposited in the reservoir through a port 10 provided for the purpose in the top of the head. The port 10 is normally closed bya threaded closure plug 11. y

The reference numeral 12 designates a piston which is mounted for reciprocation in the cylinder 1, a diametrically extending wrist pin 13 being mounted in the skirt portion of said piston upon which a connecting rod 14 is journaled. The piston 12 is provided with a solid head portion 15 having a stepped recess or depression 16 therein. Fig. 5 shows that the piston may be employed without this stepped depression 16. A trailer 17 is operable in the cylinder 1 and extends slidably through the head 5, said trailer having a tapered lower end portion 18 for disposition in the stepped depression 16 and terminating in a threaded shank 19 for insertion through an opening provided therefor centrally in the head portion 15. A retaining nut 20 is threaded on the shank 19 for connecting the trailer 17 to the piston 12 for reciprocation therewith. It will be noted that the trailer 17 is spaced inwardly from the cylinder 1 and that the lower end portion 18 of said trailer is spaced from the stepped walls of the depression 16. The trailer 17 is disposed concentrically in the cylinder 1. The piston 12 is circumferentially grooved at spaced points for the reception of suitable rings 21.

It will be noted that the trailer 17 is hollow and open at its upper end, thus making for economy in material and lightness in weight. However, if desired, a solid trailer 22 as seen in Figure 7 of the drawings may be provided. In addition to other functions, the trailers 17 and 22 provide a reciprocating guide for the piston 12 in the cylinder 1 with the result that, the tendency to wear untrue due to lateral thrust by the connecting rod will be reduced on the piston. and,

the cylinder, as will be obvious.

It is believed that the many advantages of a structure in accordance ,withthe present invention will be readily understood, and

although the preferred embodiment. of the invention is as illustrated and described, it isto be understood that changes the details ofconstructionandin combination and arrangement of parts may be resorted to whichwill fall within the scope of the inven: tion as claimed.

What is claimed is A cylinder open at its ends, a head having a bore of smaller diameter than the; bore of the cylinder, mounted on one end'ofsaid cylindensaid head being open at its ends,

a piston mounted for reciprocation in, the cyl nder, said piston-comprising a solid head portion having a stepped depression therein andvfurther having a centrally disposed} opening in the head portion thereof, and a trailer, operablein the cylinder and slidable through the head, rigidly connected to thepiston for reciprocation therewith, said trailer [being spaced inwardly and concentrically from the cylinder and including a tapered,

end portion disposed in; the depression in spaced, concentric relation to the stepped walls of said depression, a threaded shank projecting fromthe taperedend of the trailer, said shank disposed through the opening in the edge portion of thepiston, and a retaining nut threadedon the, shank for connectingthe trailer to the piston.

In testimony whereof I aflix my, signature;

WILLIAM C. HAGANI 

